Registry cleaner
The two free programs I have tried are EasyCleaner and RegSeeker.
For either program, just run the default registry cleaning option. You will be surprised at the amount of gunk that the registry cleaners will find.
Both will select the option to backup your registry by default, so you can undo any cleaning that causes problems in your system. It is possible to go overboard with the cleaning, so play it safe.
Firewall Guard
Since I upgraded to Windows XP service pack 2, I have only been using Window's built-in firewall. And it is good enough. But if you like more control, install Zone Alarm's or Kerio's Personal firewalls. A firewall blocks unauthorised users from entering.
Uninstaller Aids
Despite its limitations, I am comfortable with using Window's built-in Add and Remove Programs function, accessible from the Control Panel.
The issue, though, is that it does not totally remove the traces of various applications that are beinbg removed.
Why that happens: Add and Remove is basically a launch-pad for uninstallers of programs created during the programs' set-up process. The problem with some of these uninstallers is that they still leave traces of the programs' set-up such as registry entries and .DLLs (dynamic link library) and folders. This does not bug me: What I do is to run a registry cleaning once in a while.
But those who want squeaky clean systems, I have tried Your Uninstaller! 2006 and like it. Newbies should run it in basic mode, and progress to Pro mode when they are more confident.
Where to download:
Speedy tune-ups
Temporary files scattered all over your hard disk, Internet browsing histories, and too many unwanted startup programs -- clear them out and make your computer work faster.
Again, look to the registry cleaners. Yes, those tools can be more than sweep your registry.
Article contributed by Mike Lee, a freelance IT writer.